Hair coloring tool



FIG. 1 is a perspective view of a hair coloring tool showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for “hair coloring tool”, as shown. 